*{
    padding: 0;
    margin: 0 auto;
    background-color: black;
    color:white;
}
body{
    width: 100%;
    height: 100%;
}
div{
    transition: all 0.042s ;
}
#btnsControl{
    width: 1433px;
    height: 30px;
}
#btnsControl>button{
    /* float:left; */
    /* display:block; */
    width: 234px;
    height: 30px;
    background-color: black;
}
pre{
    display:block ;
    color:white;
    position:absolute;
    top:150px;
    left:800px;
    font-size:12px;
}
#daima{
    display: none;
}
